diff --git a/MOLH.podspec b/MOLH.podspec
index c10d699..3f76121 100755
--- a/MOLH.podspec
+++ b/MOLH.podspec
@@ -30,5 +30,5 @@ s.source_files  = "MOLH/*.swift"
 
 s.requires_arc = true
 
-
+s.swift_version = '4.2'
 end